惠州市农业土壤中邻苯二甲酸酯(PAEs)含量的分布特征

用气相色谱法(GC-FID)对地处珠三角地区的惠州市49个农业土壤样品中的16种PAEs化合物进行了测定。结果表明,PAEs的检出率高达100%,其中土壤中PAEs含量范围为183.48～2 037.56 ug/kg,平均600.42 ug/kg,以DnBP、BEHP和DEHP等为主。在3种主要利用类型土壤中,∑PAEs含量高低排序为菜地水田果园。与美国土壤PAEs控制标准相比,惠州土壤中的DnBP、DMP和DEP含量超标,其中DnBP的超标率达85.71%。总体上惠州市农业土壤已受到一定程度的PAEs污染,但同其它地区相比处于较低水平。

Distribution of Phthalic Acid Esters in Agricultural Soils of Huizhou City

This study detects sixteen kinds of phthalic acid esters （PAEs） in forty - nine agricultural soil samples from Huizhou City by GC - FID method. The PAEs were found in all the samples. The PAEs content in soils was between 183.48ug/ kg and 2 037. 56ug/kg with average content of 600. 42ug/kg. The main PAEs components are DnBP, BEHP and DEHP. Com- pared with corresponding PAEs control limits in USA, the contents of DnBP, DMP and DEP exceed the limits, of which DnBP exceeded seriously by 85.71%. The order of residue levels in different land use patterns are as follows：pot garden 〉 paddy field 〉 fruit garden. The results show that the agricultural soils of Huizhou were contaminated by PAEs, but the contamination level was relatively lower as compared to those reported for other places.